syscon.c

MIPS下的boottloader yamon 的源代码

/************************************************************************
 *
 *  syscon.c
 *
 *  SYSCON module, generic parts (except TTY related parts)
 *
 *
 * ######################################################################
 *
 * Copyright (c) 1999-2000 MIPS Technologies, Inc. All rights reserved. 
 * 
 * Unpublished rights reserved under the Copyright Laws of the United States of 
 * America. 
 * 
 * This document contains information that is proprietary to MIPS Technologies, 
 * Inc. ("MIPS Technologies"). Any copying, modifying or use of this information 
 * (in whole or in part) which is not expressly permitted in writing by MIPS 
 * Technologies or a contractually-authorized third party is strictly 
 * prohibited. At a minimum, this information is protected under unfair 
 * competition laws and the expression of the information contained herein is 
 * protected under federal copyright laws. Violations thereof may result in 
 * criminal penalties and fines. 
 * MIPS Technologies or any contractually-authorized third party reserves the 
 * right to change the information contained in this document to improve 
 * function, design or otherwise. MIPS Technologies does not assume any 
 * liability arising out of the application or use of this information. Any 
 * license under patent rights or any other intellectual property rights owned 
 * by MIPS Technologies or third parties shall be conveyed by MIPS Technologies 
 * or any contractually-authorized third party in a separate license agreement 
 * between the parties. 
 * The information contained in this document constitutes one or more of the 
 * following: commercial computer software, commercial computer software 
 * documentation or other commercial items. If the user of this information, or 
 * any related documentation of any kind, including related technical data or 
 * manuals, is an agency, department, or other entity of the United States 
 * government ("Government"), the use, duplication, reproduction, release, 
 * modification, disclosure, or transfer of this information, or any related 
 * documentation of any kind, is restricted in accordance with Federal 
 * Acquisition Regulation 12.212 for civilian agencies and Defense Federal 
 * Acquisition Regulation Supplement 227.7202 for military agencies. The use of 
 * this information by the Government is further restricted in accordance with 
 * the terms of the license agreement(s) and/or applicable contract terms and 
 * conditions covering this information from MIPS Technologies or any 
 * contractually-authorized third party. 
 *
 ************************************************************************/


/************************************************************************
 *  Include files
 ************************************************************************/

#include <string.h>
#include <stdio.h>
#include <sysdefs.h>
#include <sysdev.h>
#include <syscon_api.h>
#include <syscon.h>
#include <sys_api.h>
#include <syserror.h>
#include <string.h>
#include <product.h>
#include <sysenv_api.h>
#include <env_api.h>
#include <eeprom_api.h>
#include <io_api.h>
#include <spd.h>
#include <shell_api.h>
#include <net_api.h>


/************************************************************************
 *  Definitions
 ************************************************************************/

/************************************************************************
 *  Public variables
 ************************************************************************/

/************************************************************************
 *  Static variables
 ************************************************************************/


/* Constant used for determining endianness */
static const UINT32 endian_test = 0x12345678;

/* Reset value of CP0 config register */
static UINT32 config_init;

/* Memory allocation pointers */
static void *SYSCON_free;
static void *SYSCON_last;

/*  Keeps the memory chunk, to be allocated dynamically during 
 *  system initialization.
 */
static UINT8  SYSCON_dynamic_memory[SYS_MALLOC_DYNAMIC_MEMORY_SIZE];

/* Used for generic error string formatting */
static UINT8 syscon_generic_error_string[200] ;

/* Keeps the registered sys_error lookup function per subsystem */
static t_sys_error_lookup registered_lookup[SYSERROR_DOMAIN_COUNT] ;

/* Syscon error strings */
static char* syscon_error_string[] =
{
    /* ERROR_SYSCON_OUT_OF_MEMORY    */ "Internal: Out of memory (SYSCON)",
    /* ERROR_SYSCON_UNKNOWN_PARAM    */ "Internal: Invalid ID (SYSCON)",
    /* ERROR_SYSCON_IP_UNKNOWN	     */	"IP address unknown",
    /* ERROR_SYSCON_SUBNET_UNKNOWN   */	"Subnetmask unknown",
    /* ERROR_SYSCON_GATEWAY_UNKNOWN  */	"Default gateway unknown",
    /* ERROR_SYSCON_READ_ONLY_ID     */ "Internal: Read-only ID (SYSCON)",
    /* ERROR_SYSCON_WRITE_ONLY_ID    */ "Internal: Write-only ID (SYSCON)",
    /* ERROR_SYSCON_ENV_VAR_TOO_BIG  */ "Internal: Size of env. var too big (SYSCON)",
    /* ERROR_SYSCON_INVALID_CHAR_POS */ "Internal: Invalid character position (SYSCON)"
};

/* Array for the SYSCON objects */
static t_syscon_obj  syscon_objects[SYSCON_OBJ_COUNT];

/************************************************************************
 *  Static function prototypes
 ************************************************************************/

static INT32 
spd_read( 
    UINT32  minor,		/* Minor device number			*/
    UINT32  offset,		/* Byte position			*/
    UINT32  length,		/* Byte count				*/
    void    *user_variable );   /* Buffer for data			*/

/************************************************************************
 *  Implementation : Static functions
 ************************************************************************/


/************************************************************************
 *
 *                          spd_read
 *  Description :
 *  -------------
 *
 *  Read SPD eeprom data by calling EEPROM driver
 *
 *  Return values :
 *  ---------------
 *
 *  Driver return value (OK in case of no error)
 *
 ************************************************************************/
static INT32 
spd_read( 
    UINT32  minor,		/* Minor device number			*/
    UINT32  offset,		/* Byte position			*/
    UINT32  length,		/* Byte count				*/
    void    *user_variable )    /* Buffer for data			*/
{
    t_EEPROM_read_descriptor readbuf;

    readbuf.offset = offset;
    readbuf.length = length;
    readbuf.buffer = user_variable;

    return IO_read( SYS_MAJOR_EEPROM_IIC, minor, &readbuf );
}


/************************************************************************
 *  Implementation : Static functions registered for handling particular 
 *  SYSCON objects for particular platform(s)
 ************************************************************************/


/************************************************************************
 *  board_sn_generic_read
 ************************************************************************/
static UINT32
board_sn_generic_read( 
    void *param,
    void *data )
{
    t_sn_bcd  *sn;
    char      *msg = (char *)param;
    UINT8     number[3];
    UINT32    i;

    syscon_get_eeprom_data( NULL, &sn );
  
    if( sn != NULL )
    {
        msg[0] = '\0';
	for( i=0; i < SYS_SN_BCD_SIZE; i++ )
        {
            sprintf( number, "%d%d", (*sn)[i] >> 4, (*sn)[i] & 0xF );
	    strcat( msg, number );
        }

	return OK;
    }
    else
        return ERROR_SYSCON_UNKNOWN_PARAM;
}


/************************************************************************
 *  com_en0_mac_addr_generic_read
 ************************************************************************/
static UINT32
com_en0_mac_addr_generic_read(
    void *param,
    void *data )
{

	if(env_get("ethaddr", NULL, param, sizeof(t_mac_addr)) )
		return OK;
	else
	{
		printf("error reading MAC address");
		return ERROR_SYSCON_UNKNOWN_PARAM;
	}


#if 0
    t_mac_addr *mac_addr;
	t_mac_addr  mac_addr_buffer;

	if( sys_platform == PRODUCT_PB1000_ID)
    {
		/* PBUpdate - TThis will need to be updated so that each board can have
		unique identifier */

        mac_addr_buffer[0] = 0x00;
		mac_addr_buffer[1] = 0x50;
		mac_addr_buffer[2] = 0xc2;
		mac_addr_buffer[3] = 0x0c;
		mac_addr_buffer[4] = 0x20;
		mac_addr_buffer[5] = 0x00;

		mac_addr = &mac_addr_buffer;

    }
	else
		syscon_get_eeprom_data( &mac_addr, NULL );



    if( mac_addr != NULL )
    {
        memcpy( param, mac_addr, sizeof(t_mac_addr) );
	return OK;
    }
    else
        return ERROR_SYSCON_UNKNOWN_PARAM;

#endif 

}


/************************************************************************
 *  com_en0_ip_addr_generic_read
 ************************************************************************/
static UINT32
com_en0_ip_addr_generic_read(
    void *param,
    void *data )
{
    return
        env_get( "ipaddr", NULL, param, sizeof(UINT32) ) ?
	    OK : ERROR_SYSCON_IP_UNKNOWN;
}


/************************************************************************
 *  com_en0_ip_subnetmask_generic_read
 ************************************************************************/
static UINT32
com_en0_ip_subnetmask_generic_read(
    void *param,
    void *data )
{
    return 
        env_get( "subnetmask", NULL, param, sizeof(UINT32) ) ?
	    OK : ERROR_SYSCON_SUBNET_UNKNOWN;
}


/************************************************************************
 *  com_en0_ip_gatewayaddr_generic_read
 ************************************************************************/
static UINT32
com_en0_ip_gatewayaddr_generic_read(
    void *param,
    void *data )
{
    return
        env_get( "gateway", NULL, param, sizeof(UINT32) ) ?
	    OK : ERROR_SYSCON_GATEWAY_UNKNOWN;
}

/************************************************************************
 *  com_en0_enable
 ************************************************************************/
static UINT32
com_en0_enable(
    void *param,
    void *data )
{
    shell_arch_dma( TRUE ) ;
    return( OK ) ;
}


/************************************************************************
 *  com_en0_disable
 ************************************************************************/
static UINT32
com_en0_disable(
    void *param,
    void *data )
{
    shell_arch_dma( FALSE ) ;
    return( OK ) ;
}


/************************************************************************
 *  board_malloc_generic_read
 ************************************************************************/
static UINT32
board_malloc_generic_read(
    void *param,
    void *data )
{
    t_sys_malloc *p_mem = param;
    unsigned     fraction, number;

    *(p_mem->memory) = SYSCON_free;
    fraction	     =  (unsigned) SYSCON_free % (unsigned) p_mem->boundary;
    number           =  (unsigned) SYSCON_free / (unsigned) p_mem->boundary;

    if(fraction != 0)
    {
        /* align pointer */
        *(p_mem->memory) = (void*)((number + 1) * p_mem->boundary);
    }

    /* Check fullfillment of memory request */
    if((unsigned)((*(p_mem->memory)) + p_mem->size) > (unsigned) SYSCON_last)
    {
        p_mem->memory = NULL;
        return ERROR_SYSCON_OUT_OF_MEMORY;
    }
    else
    {
        /* allocate memory */
        SYSCON_free = (*(p_mem->memory)) + p_mem->size;
	return OK;
    }
}


/************************************************************************
 *  board_free_mem_generic_read
 ************************************************************************/
static UINT32
board_free_mem_generic_read(
    void *param,
    void *data )
{
    *(UINT32 *)param = sys_freemem;
    return OK;
}


/************************************************************************
 *  board_productid_generic_read
 ************************************************************************/
static UINT32
board_productid_generic_read(
    void *param,
    void *data )
{
    *(UINT32 *)param = PRODUCT_PB1000_ID;
    return OK;
}


/************************************************************************
 *  board_productrev_generic_read
 ************************************************************************/
static UINT32
board_productrev_generic_read(
    void *param,
    void *data )
{
    *(UINT32 *)param = 0;
    return OK;
}


/************************************************************************
 *  board_appl_stack_size_generic_read
 ************************************************************************/
static UINT32
board_appl_stack_size_generic_read(
    void *param,
    void *data )
{
    *(UINT32 *)param = SYS_APPL_STACK_SIZE;
    return OK;
}


/************************************************************************
 *  board_stack_size_generic_read
 ************************************************************************/
static UINT32
board_stack_size_generic_read(
    void *param,
    void *data )
{
    *(UINT32 *)param = SYS_STACK_SIZE;
    return OK;
}


/************************************************************************
 *  board_revision_generic_read
 ************************************************************************/
static UINT32
board_revision_generic_read(
    void *param,
    void *data )
{
    *(UINT32 *)param = MIPS_REVISION;
    return OK;
}


/************************************************************************
 *  board_cpu_clock_freq_generic_read
 ************************************************************************/
static UINT32
board_cpu_clock_freq_generic_read(
    void *param,
    void *data )
{
    *(UINT32 *)param = sys_cpufreq_hz;
    return OK;
}

/************************************************************************
 *  board_cpu_clock_freq_generic_write
 ************************************************************************/
static UINT32
board_cpu_clock_freq_generic_write(
    void *param,
    void *data )
{
    sys_cpufreq_hz = *(UINT32 *)param;
    return OK;
}


/************************************************************************
 *  board_bus_clock_freq_generic_read
 ************************************************************************/
static UINT32
board_bus_clock_freq_generic_read(
    void *param,
    void *data )
{
    *(UINT32 *)param = sys_busfreq_hz;
    return OK;
}

/************************************************************************
 *  board_bus_clock_freq_generic_write
 ************************************************************************/
static UINT32
board_bus_clock_freq_generic_write(
    void *param,
    void *data )
{
    sys_busfreq_hz = *(UINT32 *)param;
    return OK;
}


/************************************************************************
 *  cpu_icache_size_generic_read
 ************************************************************************/
static UINT32
cpu_icache_size_generic_read(
    void *param,
    void *data )
{
    *(UINT32 *)param = sys_icache_linesize * sys_icache_lines;
    return OK;
}


/************************************************************************
 *  cpu_icache_linesize_generic_read
 ************************************************************************/
static UINT32
cpu_icache_linesize_generic_read(
    void *param,
    void *data )
{
    *(UINT32 *)param = sys_icache_linesize;
    return OK;
}


/************************************************************************
 *  cpu_icache_assoc_generic_read